Biomechanical evaluation of internal fixation of different anterior canulated screws for the treatment of type odontoid fracture
10.3969/j.issn.1673-8225.2009.22.040
- VernacularTitle:不同前路中空加压螺纹钉内固定治疗Ⅱ型齿突骨折的生物力学评价
- Author:
Guowei HAN
;
Shaoyu LIU
;
Weidong ZHAO
;
Binsheng YU
;
Chunxiang LIANG
;
Bailing CHEN
;
Haomiao LI
;
Fuxin WEI
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2009;13(22):4377-4380
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND:Antedor canulated screw has been considered an ideal method to treat odontoid fracture.OBJECTIVE:To compare the biomechanical properties of different anterior screws.DESIGN,TIME AND SETTING:A randomized contrast study was performed at the Biomechanics Laboratory of Southern Medical University from March to September 2006.MATERIALS:Double-thread canulated screws and single-thread canulated screws were made of titanium alloy and provided by Shuangyang Medical Apparatus Co.,Ltd.,Suzhou.METHODS:A total of head-neck complexes (C0-C3) which were collected from 20 corpses were maintained in formaldehyde for less than 3 months;thereafter,the muscles and ligaments were removed to obtain the axis specimens so as to make type Ⅱ odontoid fracture models.The fracture samples were individually treated with double-thread and single-thread canulated screws,with 10 samples for each group.MAIN OUTCOME MEASURES:The shear stiffness and the maximum resistance of the two kinds of screw were tested in this study.RESULTS:The shear stiffness of the double-thread screw group was significantly higher than the single-thread screw group (P＜0.01 );however,there was no significant different in the maximum resistance between the two groups (P＞0.05).CONCLUSION:Double-thread canulated screws have a strong biomechanical stability for treating odontoid fracture;therefore,the first choice of the internal fixation should be double-thread canuiated screws for patients with osteoporosis or those who are susceptible to expanded screw pathway during surgical procedures.
